new hosts appearing between 2011-06-19_1000 and 2011-06-19_1500:
www.rafflecopter.com
www.rescuetime.com

hosts disappearing between 2011-06-19_1000 and 2011-06-19_1500:
www.iij4u.or.jp
www.k12.pa.us
www.luo.bo
www.nta.go.jp
www.rackspace.com